Revert "Add a file to trivially disable tool building or testing"

This reverts commit ab018c76e14b87f3c9e0b7384cc9b02d94779cd5.

This also adds the `ToolBuild::is_ext_tool` field to replace the previous
`ToolBuild::expectation` field, to indicate whether a build-failure of
certain tool is essential.

6 files changed, 31 insertions, 126 deletions

diff --git a/src/bootstrap/check.rs b/src/bootstrap/check.rs
index eee403dcbe3..79a6a39d546 100644
--- a/src/bootstrap/check.rs
+++ b/src/bootstrap/check.rs
@@ -23,7 +23,7 @@ use std::path::{PathBuf, Path};
 use std::process::Command;
 use std::io::Read;
 
-use build_helper::{self, output, BuildExpectation};
+use build_helper::{self, output};
 
 use builder::{Kind, RunConfig, ShouldRun, Builder, Compiler, Step};
 use cache::{INTERNER, Interned};
@@ -65,23 +65,19 @@ impl fmt::Display for TestKind {
     }
 }
 
-fn try_run_expecting(build: &Build, cmd: &mut Command, expect: BuildExpectation) -> bool {
+fn try_run(build: &Build, cmd: &mut Command) -> bool {
     if !build.fail_fast {
-        if !build.try_run(cmd, expect) {
+        if !build.try_run(cmd) {
             let mut failures = build.delayed_failures.borrow_mut();
             failures.push(format!("{:?}", cmd));
             return false;
         }
     } else {
-        build.run_expecting(cmd, expect);
+        build.run(cmd);
     }
     true
 }
 
-fn try_run(build: &Build, cmd: &mut Command) {
-    try_run_expecting(build, cmd, BuildExpectation::None);
-}
-
 fn try_run_quiet(build: &Build, cmd: &mut Command) {
     if !build.fail_fast {
         if !build.try_run_quiet(cmd) {
@@ -259,11 +255,7 @@ impl Step for Rls {
 
         builder.add_rustc_lib_path(compiler, &mut cargo);
 
-        if try_run_expecting(
-            build,
-            &mut cargo,
-            builder.build.config.toolstate.rls.passes(ToolState::Testing),
-        ) {
+        if try_run(build, &mut cargo) {
             build.save_toolstate("rls", ToolState::Testing);
         }
     }
@@ -309,11 +301,7 @@ impl Step for Rustfmt {
 
         builder.add_rustc_lib_path(compiler, &mut cargo);
 
-        if try_run_expecting(
-            build,
-            &mut cargo,
-            builder.build.config.toolstate.rustfmt.passes(ToolState::Testing),
-        ) {
+        if try_run(build, &mut cargo) {
             build.save_toolstate("rustfmt", ToolState::Testing);
         }
     }
@@ -363,11 +351,7 @@ impl Step for Miri {
 
             builder.add_rustc_lib_path(compiler, &mut cargo);
 
-            if try_run_expecting(
-                build,
-                &mut cargo,
-                builder.build.config.toolstate.miri.passes(ToolState::Testing),
-            ) {
+            if try_run(build, &mut cargo) {
                 build.save_toolstate("miri", ToolState::Testing);
             }
         } else {
@@ -422,11 +406,7 @@ impl Step for Clippy {
 
             builder.add_rustc_lib_path(compiler, &mut cargo);
 
-            if try_run_expecting(
-                build,
-                &mut cargo,
-                builder.build.config.toolstate.clippy.passes(ToolState::Testing),
-            ) {
+            if try_run(build, &mut cargo) {
                 build.save_toolstate("clippy-driver", ToolState::Testing);
             }
         } else {
diff --git a/src/bootstrap/config.rs b/src/bootstrap/config.rs
index 87b1db33a7a..f3ffe9a2761 100644
--- a/src/bootstrap/config.rs
+++ b/src/bootstrap/config.rs
@@ -27,7 +27,6 @@ use util::exe;
 use cache::{INTERNER, Interned};
 use flags::Flags;
 pub use flags::Subcommand;
-use toolstate::ToolStates;
 
 /// Global configuration for the entire build and/or bootstrap.
 ///
@@ -134,8 +133,6 @@ pub struct Config {
     // These are either the stage0 downloaded binaries or the locally installed ones.
     pub initial_cargo: PathBuf,
     pub initial_rustc: PathBuf,
-
-    pub toolstate: ToolStates,
 }
 
 /// Per-target configuration stored in the global configuration structure.
@@ -348,18 +345,6 @@ impl Config {
             }
         }).unwrap_or_else(|| TomlConfig::default());
 
-        let toolstate_toml_path = config.src.join("src/tools/toolstate.toml");
-        let parse_toolstate = || -> Result<_, Box<::std::error::Error>> {
-            let mut f = File::open(toolstate_toml_path)?;
-            let mut contents = String::new();
-            f.read_to_string(&mut contents)?;
-            Ok(toml::from_str(&contents)?)
-        };
-        config.toolstate = parse_toolstate().unwrap_or_else(|err| {
-            println!("failed to parse TOML configuration 'toolstate.toml': {}", err);
-            process::exit(2);
-        });
-
         let build = toml.build.clone().unwrap_or(Build::default());
         set(&mut config.build, build.build.clone().map(|x| INTERNER.intern_string(x)));
         set(&mut config.build, flags.build);
diff --git a/src/bootstrap/dist.rs b/src/bootstrap/dist.rs
index 78de9ec62d9..3d2795f04e2 100644
--- a/src/bootstrap/dist.rs
+++ b/src/bootstrap/dist.rs
@@ -1077,11 +1077,6 @@ impl Step for Rls {
         let target = self.target;
         assert!(build.config.extended);
 
-        if !builder.config.toolstate.rls.testing() {
-            println!("skipping Dist RLS stage{} ({})", stage, target);
-            return None
-        }
-
         println!("Dist RLS stage{} ({})", stage, target);
         let src = build.src.join("src/tools/rls");
         let release_num = build.release_num("rls");
@@ -1164,11 +1159,6 @@ impl Step for Rustfmt {
         let target = self.target;
         assert!(build.config.extended);
 
-        if !builder.config.toolstate.rustfmt.testing() {
-            println!("skipping Dist Rustfmt stage{} ({})", stage, target);
-            return None
-        }
-
         println!("Dist Rustfmt stage{} ({})", stage, target);
         let src = build.src.join("src/tools/rustfmt");
         let release_num = build.release_num("rustfmt");
diff --git a/src/bootstrap/lib.rs b/src/bootstrap/lib.rs
index 2f00c313a0c..d6dc44034a7 100644
--- a/src/bootstrap/lib.rs
+++ b/src/bootstrap/lib.rs
@@ -143,8 +143,7 @@ use std::path::{PathBuf, Path};
 use std::process::{self, Command};
 use std::slice;
 
-use build_helper::{run_silent, run_suppressed, try_run_silent, try_run_suppressed, output, mtime,
-                   BuildExpectation};
+use build_helper::{run_silent, run_suppressed, try_run_silent, try_run_suppressed, output, mtime};
 
 use util::{exe, libdir, OutputFolder, CiEnv};
 
@@ -569,31 +568,24 @@ impl Build {
             .join(libdir(&self.config.build))
     }
 
-    /// Runs a command, printing out nice contextual information if its build
-    /// status is not the expected one
-    fn run_expecting(&self, cmd: &mut Command, expect: BuildExpectation) {
-        self.verbose(&format!("running: {:?}", cmd));
-        run_silent(cmd, expect)
-    }
-
     /// Runs a command, printing out nice contextual information if it fails.
     fn run(&self, cmd: &mut Command) {
-        self.run_expecting(cmd, BuildExpectation::None)
+        self.verbose(&format!("running: {:?}", cmd));
+        run_silent(cmd)
     }
 
     /// Runs a command, printing out nice contextual information if it fails.
     fn run_quiet(&self, cmd: &mut Command) {
         self.verbose(&format!("running: {:?}", cmd));
-        run_suppressed(cmd, BuildExpectation::None)
+        run_suppressed(cmd)
     }
 
-    /// Runs a command, printing out nice contextual information if its build
-    /// status is not the expected one.
-    /// Exits if the command failed to execute at all, otherwise returns whether
-    /// the expectation was met
-    fn try_run(&self, cmd: &mut Command, expect: BuildExpectation) -> bool {
+    /// Runs a command, printing out nice contextual information if it fails.
+    /// Exits if the command failed to execute at all, otherwise returns its
+    /// `status.success()`.
+    fn try_run(&self, cmd: &mut Command) -> bool {
         self.verbose(&format!("running: {:?}", cmd));
-        try_run_silent(cmd, expect)
+        try_run_silent(cmd)
     }
 
     /// Runs a command, printing out nice contextual information if it fails.
@@ -601,7 +593,7 @@ impl Build {
     /// `status.success()`.
     fn try_run_quiet(&self, cmd: &mut Command) -> bool {
         self.verbose(&format!("running: {:?}", cmd));
-        try_run_suppressed(cmd, BuildExpectation::None)
+        try_run_suppressed(cmd)
     }
 
     pub fn is_verbose(&self) -> bool {
diff --git a/src/bootstrap/tool.rs b/src/bootstrap/tool.rs
index fa9bdc43c37..16e8b025b08 100644
--- a/src/bootstrap/tool.rs
+++ b/src/bootstrap/tool.rs
@@ -22,7 +22,6 @@ use native;
 use channel::GitInfo;
 use cache::Interned;
 use toolstate::ToolState;
-use build_helper::BuildExpectation;
 
 #[derive(Debug, Copy, Clone, Hash, PartialEq, Eq)]
 pub struct CleanTools {
@@ -82,7 +81,7 @@ struct ToolBuild {
     tool: &'static str,
     path: &'static str,
     mode: Mode,
-    expectation: BuildExpectation,
+    is_ext_tool: bool,
 }
 
 impl Step for ToolBuild {
@@ -102,7 +101,7 @@ impl Step for ToolBuild {
         let target = self.target;
         let tool = self.tool;
         let path = self.path;
-        let expectation = self.expectation;
+        let is_ext_tool = self.is_ext_tool;
 
         match self.mode {
             Mode::Libstd => builder.ensure(compile::Std { compiler, target }),
@@ -115,34 +114,25 @@ impl Step for ToolBuild {
         println!("Building stage{} tool {} ({})", compiler.stage, tool, target);
 
         let mut cargo = prepare_tool_cargo(builder, compiler, target, "build", path);
-        let is_expected = build.try_run(&mut cargo, expectation);
-        // If the expectation is "Failing", `try_run` returning true actually
-        // means a build-failure is successfully observed, i.e. the tool is
-        // broken. Thus the XOR here.
-        // Sorry for the complicated logic, but we can remove this expectation
-        // logic after #45861 is fully fixed.
-        build.save_toolstate(tool, if is_expected ^ (expectation == BuildExpectation::Failing) {
+        let is_expected = build.try_run(&mut cargo);
+        build.save_toolstate(tool, if is_expected {
             ToolState::Compiling
         } else {
             ToolState::Broken
         });
 
         if !is_expected {
-            if expectation == BuildExpectation::None {
+            if !is_ext_tool {
                 exit(1);
             } else {
                 return None;
             }
-        }
-
-        if expectation == BuildExpectation::Succeeding || expectation == BuildExpectation::None {
+        } else {
             let cargo_out = build.cargo_out(compiler, Mode::Tool, target)
                 .join(exe(tool, &compiler.host));
             let bin = build.tools_dir(compiler).join(exe(tool, &compiler.host));
             copy(&cargo_out, &bin);
             Some(bin)
-        } else {
-            None
         }
     }
 }
@@ -251,8 +241,8 @@ macro_rules! tool {
                     tool: $tool_name,
                     mode: $mode,
                     path: $path,
-                    expectation: BuildExpectation::None,
-                }).expect("expected to build -- BuildExpectation::None")
+                    is_ext_tool: false,
+                }).expect("expected to build -- essential tool")
             }
         }
         )+
@@ -299,8 +289,8 @@ impl Step for RemoteTestServer {
             tool: "remote-test-server",
             mode: Mode::Libstd,
             path: "src/tools/remote-test-server",
-            expectation: BuildExpectation::None,
-        }).expect("expected to build -- BuildExpectation::None")
+            is_ext_tool: false,
+        }).expect("expected to build -- essential tool")
     }
 }
 
@@ -417,8 +407,8 @@ impl Step for Cargo {
             tool: "cargo",
             mode: Mode::Librustc,
             path: "src/tools/cargo",
-            expectation: BuildExpectation::None,
-        }).expect("BuildExpectation::None - expected to build")
+            is_ext_tool: false,
+        }).expect("expected to build -- essential tool")
     }
 }
 
@@ -455,14 +445,13 @@ macro_rules! tool_extended {
 
             fn run($sel, $builder: &Builder) -> Option<PathBuf> {
                 $extra_deps
-                let toolstate = $builder.build.config.toolstate.$toolstate;
                 $builder.ensure(ToolBuild {
                     compiler: $sel.compiler,
                     target: $sel.target,
                     tool: $tool_name,
                     mode: Mode::Librustc,
                     path: $path,
-                    expectation: toolstate.passes(ToolState::Compiling),
+                    is_ext_tool: true,
                 })
             }
         }
diff --git a/src/bootstrap/toolstate.rs b/src/bootstrap/toolstate.rs
index 00dbcc86af4..3c490044e4e 100644
--- a/src/bootstrap/toolstate.rs
+++ b/src/bootstrap/toolstate.rs
@@ -8,8 +8,6 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use build_helper::BuildExpectation;
-
 #[derive(Copy, Clone, Debug, Deserialize, Serialize, PartialEq, Eq)]
 /// Whether a tool can be compiled, tested or neither
 pub enum ToolState {
@@ -21,38 +19,9 @@ pub enum ToolState {
     Broken = 0,
 }
 
-impl ToolState {
-    /// If a tool with the current toolstate should be working on
-    /// the given toolstate
-    pub fn passes(self, other: ToolState) -> BuildExpectation {
-        if self as usize >= other as usize {
-            BuildExpectation::Succeeding
-        } else {
-            BuildExpectation::Failing
-        }
-    }
-
-    pub fn testing(&self) -> bool {
-        match *self {
-            ToolState::Testing => true,
-            _ => false,
-        }
-    }
-}
-
 impl Default for ToolState {
     fn default() -> Self {
         // err on the safe side
         ToolState::Broken
     }
 }
-
-#[derive(Copy, Clone, Debug, Deserialize, Default)]
-/// Used to express which tools should (not) be compiled or tested.
-/// This is created from `toolstate.toml`.
-pub struct ToolStates {
-    pub miri: ToolState,
-    pub clippy: ToolState,
-    pub rls: ToolState,
-    pub rustfmt: ToolState,
-}